Process for the preparation of powder coatings

• Main Authors: WULF MARTIN, WILKENHOENER UWE, BOLM HELENE
• Format: Patent
• Language: Chinese; English
• Published: 21.04.2010
• Subjects: ADHESIVES; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a process for the preparation of powder coatings with any desired gloss level comprising the following steps of: a) applying the powder coating composition onto the substratesurface, b) irradiating the applied powder coating composition with high energy radiation under near-ambient temperature, c) fusing, melting and flowing out the particles of the powder coating composition by increased temperature to a molten coating, and d) curing the molten coating; the process according to the invention makes it possible to control the gloss of the coating to any level, by varying the time period and the intensity of the UV-irradiation in step b).